What electronic transition in Li^(2+) produces the radiation of the same wave length as the first line in the Lyman series of hydrogen?

What electronic transition in Li^(2+) produces the radiation of the sa

1.	What electronic transition in Li^(2+) produces the radiation of the same wave length as the first line in the Lyman series of hydrogen?
Answer» N = 4 to n = 2 n = 9 to n = 6 n = 9 to n = 3 n = 6 to n = 3 Solution :`bar(upsilon) = Z^2 R [ 1/(n_1^2) - 1/(n_2^2)]` and E = `hc bar(upsilon)` `""Li^(2+) ""H` `(3)^2 (1/(n_1^2) - 1/(n_2^2)) = (1)^2 (1/((1)^2) - 1/((2)^2))` on solving`n_1 =2 , n_2 = 4`